Virtualization Client question

I am new to ISPConfig, and i installed and re-installed ISPConfig a few times this week before i get it right for production purposes.

However, i have a few questions... I installed ISPConfig on a OpenVZ VM so it can create and control OpenVZ itself (has explained on the tutorial).
I can create VM's from the admin panel itself, but i don't see on the reseller and client side the VServer tab. I want to allow the reseller the ability to "sell" VM's and the client to manage them (start, stop, restart, access, see status). Is this possible?

Another question is, can ISPConfig support also Virtualbox? I mean, installing it on a VM, i know it is possible, but i want to know if by exemple i can create a Virtualbox VM from inside the ISPConfig panel?